Detonation Sensor (Turbo)
WARNING: This page is about a different car, the 1991 Mitsubishi 3000GT and 1991 Dodge Stealth. However, it is still accessible from the selected car via links, so may be relevant.
Detonation sensor is located under intake manifold. If malfunction occurs, Code 31 will set. For testing procedure, see TESTS W/CODES article.